Shane, while your reasons (export of nutrients) for using Caulerpa are tried
and true, not ALL of my refugiums have Caulerpa in them....Some just have
hundreds of peppermint shrimp and (can you believe it ?) MORE Live Sand.
Don't forget, I'm talking about LIVE sand here, not just crushed coral or
dead substrate, this may or may not make a difference with nutrient export.
Also, while Caulerpa DOES take out organics and heavy metals, along with
nitrate, I've never seen anything that says Caulerpa helps remove toxic
quantities of Hydrogen Sulfide (?) or any other noxious gasses created by
excessively deep sand, and this is why I told that other dude that I doubt a
deep sand bed killed his reef.
I have definite necrotic areas in my sand beds that can be seen thru the
glass (black and gray areas that smell like rotten eggs) and they have been
there a long while....
Like I said, this whole discusssion started because (someone told ?) that
guy the sand bed killed his tank..Did it entirely consist of Dolomite, or
maybe BEACH-Collected sand, who knows . Even with the (1000 lbs ? ) of live
sand I use, phospate, silicate, and nitrate remain very low, including the
system with no Macro.
I don't even change that much water in these systems. I really believe that
if you start with great water, you'll keep the great water.
Tom
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